package cc.eddic.practice.spring.webapi;

import cc.eddic.practice.spring.domain.Option;
import cc.eddic.practice.spring.domain.SubCategory;
import cc.eddic.practice.spring.dto.*;
import cc.eddic.practice.spring.repository.CategoryRepository;
import cc.eddic.practice.spring.repository.QuestionRepository;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.http.HttpEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;

import javax.transaction.Transactional;
import java.util.Comparator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/api/questions")
public class QuestionRestController {
    public QuestionRestController(QuestionRepository repository){this.repository=repository;}
    private final QuestionRepository repository;
    @PostMapping
    public HttpEntity<?> add(@RequestBody final QuestionAddRequest model){
        val category=repository.save(model.as());
        return ResponseEntity.created(ServletUriComponentsBuilder.fromCurrentRequest().path("/{id}")
                .buildAndExpand(category.getId()).toUri()).build();
    }
    @Transactional
    @PostMapping("/{questionId}/options")
    public HttpEntity<?> add(@PathVariable("questionId") Long questionId, @RequestBody final OptionAddRequest model){
        val question=repository.findById(questionId).orElseThrow(NoSuchElementException::new);
        val option=model.as();
        question.add(option);
        repository.save(question);
        if (log.isDebugEnabled())log.debug(" sub category id {}",option.getId());
        val id=question.getOptions().stream().filter(x->x.getAnswer().equals(model.getAnswer()))
                .sorted(Comparator.comparing(Option::getCreatedOn).reversed())
                .map(Option::getId)
                .findFirst()
                .orElse(-1L);
        if (log.isDebugEnabled()){
            log.debug("option id {}",option.getId());
            log.debug("(filter) option id {}",id);
        }
        return ResponseEntity.created(ServletUriComponentsBuilder.fromCurrentRequest().path("/{questionId}/options/{optionId}")
                .buildAndExpand(question.getId(),id).toUri()).build();
    }
//获取类中所有子类信息
    @GetMapping("/{questionId}/options")
    public HttpEntity<?> get(@PathVariable("questionId") Long questionId){
        if (log.isDebugEnabled()) log.debug("questionId={}",questionId);
        val question=repository.findById(questionId).orElseThrow(NoSuchElementException::new);
        return ResponseEntity.ok(question.getOptions().stream().map(OptionResponse::from).collect(Collectors.toList()));
    }
//根据子类ID获取信息
    @GetMapping("/{questionId}/options/{optionId}")
    public HttpEntity<?> get(@PathVariable("questionId") Long questionId,@PathVariable("optionId") Long optionId){
        val question=repository.findById(questionId).orElseThrow(NoSuchElementException::new);
        val option=question.getOptions().stream().filter(option1->option1.getId().equals(optionId)).findFirst()
                .orElseThrow(NoSuchElementException::new);
        return ResponseEntity.ok(OptionResponse.from(option));
    }
    @GetMapping("/{id}")
    public HttpEntity<QuestionResponse> get(@PathVariable("id") final long id){
        if(log.isDebugEnabled()) log.debug("id={}",id);
        val question=repository.findById(id).orElseThrow(NoSuchElementException::new);
        return ResponseEntity.ok(QuestionResponse.from(question));
    }
    @DeleteMapping("/{id}")
    public HttpEntity<?> del(@PathVariable("id") final long id){
        repository.deleteById(id);
        return ResponseEntity.noContent().build();
    }

    @GetMapping
    public HttpEntity<List<QuestionResponse>> getAll(){
        val question=repository.findAll().stream().map(QuestionResponse::from).collect(Collectors.toList());
        return ResponseEntity.ok(question);
    }
}
